Feedback on hps bulbs ushio vs hortilux for flowering?

Can i get some feedback from hps users with experiance with both bulbs to give pro's and con's to these bulbs? I was wondering if one is a better performer for flowering than the other from folks experiance's? thankyou.

i only ever used hortelux until i changed to digital ballasts and they flickered. i switched to usio and love them. as far as difference, i dont see any.